1. Calculating Particles for an ion

2. Representations from the Periodic Table 26 +2 Fe Iron 55.845 2-8-14-2 Oxidation States Name Atomic Mass Atomic Number Symbol Electron Configuration Electrons/Level +3

3. Calculating Number of Protons Atomic Number Atomic Number for an atom that is an ion = # of Protons 26 +2 Fe Iron 55.845 2-8-14-2 +3

4. Calculating Number of Electrons Atomic Number Atomic Number for an atom that is an ion = # of Protons 26 +2 Fe Iron 55.845 2-8-14-2 +3 # of electrons = Protons – charge Ex. 26-(+2) = 24

5. 26 +2 Fe Iron 55.845 2-8-14-2 Calculating Number of Neutrons If Most Common Isotope - Round Atomic Mass to nearest whole number so 56 AMU Neutrons = Mass Number – Atomic Number +3

6. Calculating Mass Number Mass Number = Sum of the protons and neutrons 26 +2 Fe Iron 55.845 2-8-14-2 +3

7. Isotope Name Element Name followed by hyphen and then Mass Number ex. Iron - 56 26 +2 Fe Iron 55.845 2-8-14-2 +3

8. Isotope Notation X m p m = mass number: # of Protons + Neutrons p = Atomic Number: # of protons X = symbol of element 26 +2 Fe Iron 55.845 2-8-14-2 +3 Ex = Fe 56 26 c c = charge of element +2

9. Calculating Charge Charge = Protons – Electrons Ex. 26 – 24 = +2 26 +2 Fe Iron 55.845 2-8-14-2 +3

10. Element / Symbol Isotope Name Isotope Notation Atomic Number Protons (p + ) Neutrons (n 0 ) Electrons (e - ) Mass Number Iron Fe Iron-56 56 Fe +2 26 302456 Final Answers for Iron